Fuel feed apparatus

ABSTRACT

A reservoir is located in a fuel tank. The reservoir is in a bottomed tubular shape having a periphery defining an opening. A lid member is located in the fuel tank and mounted to the periphery of the reservoir to close the opening. A pump unit is partially accommodated in the reservoir to discharge fuel stored in the reservoir to an exterior of the fuel tank. The pump unit is located at a position offset from a center axis of the lid member. The pump unit has a projection projected from the lid member to an exterior of the reservoir. A remaining quantity detector is configured to detect a quantity of fuel in the fuel tank. The remaining quantity detector is located at a remaining space remaining in the fuel tank. The remaining space is located on the lid member and located around the projection.

CROSS REFERENCE TO RELATED APPLICATIONS

This application is based on and claims priority to Japanese PatentApplications No. 2010-204625 filed on Sep. 13, 2010 and No. 2011-117194filed on May 25, 2011, the contents of which are incorporated in theirentirely herein by reference.

FIELD OF THE INVENTION

The present invention relates to a fuel feed apparatus equipped in afuel tank of a vehicle for feeding fuel to an exterior of the fuel tank.

BACKGROUND OF THE INVENTION

For example, a known fuel feed apparatus includes a bottomed tubularreservoir located in a fuel tank for storing fuel and a pump unit fordischarging stored fuel to an exterior of the fuel tank.

JP-A-2008-248801 discloses one example of such a reservoir-type fuelfeed apparatus including an annular bracket located in a fuel tank. Theannular bracket is mounted to an opening periphery of the reservoir forsupporting a pump unit. The fuel feed apparatus disclosed inJP-A-2008-248801 includes a remaining quantity detector located in afuel tank and provided to the outside of the reservoir. The remainingquantity detector detects remaining fuel in the fuel tank.

When a vehicle equipped with the fuel feed apparatus disclosed inJP-A-2008-248801 is inclined quickly relative to the horizontal surface,fuel may spill from the opening of the reservoir. Consequently, thereservoir may not be able to secure fuel sufficiently for supplying tothe exterior of the fuel tank. It is conceivable to increase the heightof the reservoir in order to reduce such spill of fuel from thereservoir. However, when the height of the reservoir is increased, it ishard to secure a space for accommodating the remaining quantity detectoron the reservoir, in consideration of the limited volume of the fueltank. In the fuel feed apparatus of JP-A-2008-248801, the lateral sideof the reservoir is dented inward to secure a space for receiving theremaining quantity detector. However, the structure of JP-A-2008-248801is undesirable, since the reservoir is reduced in volume by the dentedspace, and consequently, the amount of fuel storage is also reduced.

SUMMARY OF THE INVENTION

In view of the foregoing and other problems, it is an object of thepresent invention to produce a fuel feed apparatus including a reservoirlocated in the fuel tank, the reservoir having an enlarged fuel storage.

According to one aspect of the present invention, a fuel feed apparatusfor feeding fuel from a fuel tank, the fuel feed apparatus comprises areservoir located in the fuel tank, the reservoir being in a bottomedtubular shape having a periphery defining an opening. The fuel feedapparatus further comprises a lid member located in the fuel tank andmounted to the periphery of the reservoir to close the opening. The fuelfeed apparatus further comprises a pump unit partially accommodated inthe reservoir and configured to discharge fuel stored in the reservoirto an exterior of the fuel tank, the pump unit being located at aposition offset from a center axis of the lid member, the pump unithaving a projection projected from the lid member to an exterior of thereservoir. The fuel feed apparatus further comprises a remainingquantity detector configured to detect a quantity of fuel in the fueltank, the remaining quantity detector being located at a remaining spaceremaining in the fuel tank, the remaining space being located on the lidmember and located around the projection.

BRIEF DESCRIPTION OF THE DRAWINGS

The above and other objects, features and advantages of the presentinvention will become more apparent from the following detaileddescription made with reference to the accompanying drawings. In thedrawings:

FIG. 1 is a perspective view showing a fuel feed apparatus according tothe first embodiment;

FIG. 2 is a sectional view taken along the line II-II in FIG. 3;

FIG. 3 is a top view showing the fuel feed apparatus;

FIG. 4 is a top view showing a reservoir of the fuel feed apparatus;

FIG. 5 is a sectional view taken along the line V-V in FIG. 2 andshowing a substantial part of the fuel feed apparatus;

FIG. 6 is a sectional view taken along the line VI-VI in FIG. 5;

FIG. 7 is a perspective view showing a lid member of the fuel feedapparatus;

FIG. 8 is a sectional view showing the fuel feed apparatus according tothe second embodiment;

FIG. 9 is a perspective view showing the fuel feed apparatus accordingto the second embodiment;

FIG. 10 is a sectional view taken along the line X-X in FIG. 8;

FIG. 11 is a perspective view showing a substantial part of the fuelfeed apparatus according to the second embodiment;

FIG. 12 is a sectional view showing a substantial of the fuel feedapparatus according to the second embodiment, the drawing correspondingto FIG. 10;

FIG. 13 is a side view showing the fuel feed apparatus according to thesecond embodiment;

FIG. 14 is a front view showing a fuel feed apparatus according to thethird embodiment;

FIG. 15 is a sectional view taken along the line XV-XV in FIG. 14;

FIG. 16 is a front view showing a substantial part of the fuel feedapparatus according to the fourth embodiment;

FIG. 17 is a sectional view taken along the line XVII-XVII in FIG. 16;

FIG. 18 is a front view showing a fuel feed apparatus according to thefourth embodiment;

FIG. 19 is a sectional view taken along the line XIX-XIX in FIG. 18; and

FIG. 20 is a schematic view showing a modification of the fuel feedapparatus according to the first embodiment.

DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS

As follows, multiple embodiments of the present invention will bedescribed with reference to drawings.

First Embodiment

FIGS. 1, 2 show a fuel feed apparatus according to the first embodiment.A fuel feed apparatus 1 is equipped in a fuel tank 2 of a vehicle forfeeding fuel to an exterior of the fuel tank 2.

General Configuration

The fuel feed apparatus 1 includes a flange 10, a reservoir 20, a lidmember 30, an adjustment device 40, a pump unit 50, and a remainingquantity detector 60. As shown in FIG. 2, components 20, 30, 40, 50, and60 of the fuel feed apparatus 1 other than the flange 10 are located atpredetermined positions inside the fuel tank 2. The vertical directionin FIG. 2 substantially coincides with the vertical direction of thevehicle being on a horizontal surface.

As shown in FIGS. 1 to 3, the flange 10 in a disc shape is formed ofresin. The flange 10 is fitted in a through hole 2 b to close thethrough hole 2 b. The through hole 2 b extends through a top plateportion 2 a of the fuel tank 2. A fueling pipe 11 and an electricalconnector 12 are provided to the flange 10. The fueling pipe 11 is usedfor supplying fuel discharged from the pump unit 50 to the exterior ofthe fuel tank 2. The electrical connector 12 is electrically connectedwith the pump unit 50 and the remaining quantity detector 60. In thepresent configuration, a fuel pump 52 of the pump unit 50 is suppliedwith an electric power through the electrical connector 12, therebybeing driven and controlled. In addition, the remaining quantitydetector 60 outputs a remaining quantity detection signal through theelectrical connector 12.

As shown in FIGS. 1, 2, the reservoir 20 being in a bottomed tubularshape is formed of resin. The reservoir 20 is accommodated in the fueltank 2 and located on a bottom portion 2 c of the fuel tank 2. As shownin FIGS. 3, 5, the reservoir 20 has a center axis Cs being offset from acenter axis Cf of the flange 10. As shown in FIGS. 1, 4, a jet pump 21is provided to a bottom portion 20 a of the reservoir 20. The jet pump21 has an introduction passage 22 and a jet nozzle 23. The introductionpassage 22 communicates the interior of the fuel tank 2 with theinterior of the reservoir 20. As shown in FIG. 6, a pressure regulator54 of the pump unit 50 exhausts surplus fuel. The jet nozzle 23 jets theexhausted surplus furl into the introduction passage 22. The fuel jetcauses a negative pressure in the introduction passage 22. The negativepressure, which is lower than atmospheric pressure, causes theintroduction passage 22 to draw fuel from the fuel tank 2 into thereservoir 20. The reservoir 20 stores the fuel drawn in this way.

As shown in FIGS. 1, 2, 5, the lid member 30 formed of resin is in atubular shape having a ceiling. The lid member 30 has a circumferentialperiphery 31 a defining a lower opening 31. The circumferentialperiphery 31 a of the lid member 30 is fitted to a circumferentialperiphery 24 a of an upper opening 24 of the reservoir 20. The lidmember 30 is coaxial with the reservoir 20. As show in FIGS. 3, 5, acenter axis Cc of the lid member 30 is offset from (i.e., located at adifferent position from) the center axis Cf of the flange 10. The lidmember 30 blocks the opening 24 of the reservoir 20 accommodated in thefuel tank 2. The lid member 30 holds the pump unit 50 and the remainingquantity detector 60 in the fuel tank 2.

The adjustment device 40 includes a supporf shaft 41, an intermediatemember 42, and an elastic member 43. The support shaft 41 formed ofmetal is in a tubular shape. The support shaft 41 is press-fitted to theflange 10 to be coaxial with the flange 10. The support shaft 41 isintegrated with components (integrated components) 20, 30, 50, 60 viathe intermediate member 42. In this way, the flange 10 is connected withthe integrated components 20, 30, 50, 60 via the support shaft 41 beinga single component.

As shown in FIG. 2, the intermediate member 42 includes a pair ofbrackets 44, 45 formed of resin. The brackets 44, 45 are not rotativerelative to each other in the circumferential direction of the supportshaft 41. The brackets 44, 45 are movable relative to each other in theaxial direction of the support shaft 41. The brackets 44, 45 are mountedto the lid member 30 and the support shaft 41. Thereby, the intermediatemember 42 constructed of the brackets 44, 45 regulates relative movementbetween the support shaft 41 and the integrated components 20, 30, 50,60 in the circumferential direction of the support shaft 41 whileallowing relative movement between the support shaft 41 and theintegrated components 20, 30, 50, 60 in the axial direction of thesupport shaft 41.

In the present example, the elastic member 43 is a coil spring. Theelastic member 43 is interposed between the bracket 45 of theintermediate member 42 and the lid member 30. The bracket 45 isintegrated with the support shaft 41. The elastic member 43 applies anelastic force in the axial direction of the support shaft 41 to bias theintegrated components 20, 30, 50, 60 toward the bottom portion 2 c ofthe fuel tank 2. Thereby, the elastic member 43 regularly biases thebottom portion 20 a of the reservoir 20 onto the bottom portion 2 c ofthe fuel tank 2. In the present embodiment, the elastic member 43 andthe intermediate member 42 function to stabilize the positions of theintegrated components 20, 30, 50, 60 in the fuel tank 2.

The pump unit 50 has a lower portion accommodated in the reservoir 20and an upper portion projecting from the lid member 30. As shown inFIGS. 2, 6, the pump unit 50 includes a suction filter 51, the fuel pump52, a fuel filter 53, and the pressure regulator 54.

The suction filter 51 is located at the lowermost portion of the pumpunit 50. The suction filter 51 is connected with a fuel inlet port 52 aof the fuel pump 52 for removing large foreign matter contained in fueldrawn by the fuel pump 52 from the reservoir 20. The fuel pump 52 islocated on the upper side of the suction filter 51 in the pump unit 50.The fuel inlet port 52 a extends downward from the fuel pump 52. A fueloutlet port 52 b extends upward from the fuel pump 52. The fuel pump 52draws fuel from the reservoir 20 into the fuel inlet port 52 a throughthe suction filter 51. The fuel pump 52 draws fuel by a quantitycorresponding to rotation of a built-in motor (not shown) of the fuelpump 52. The fuel pump 52 pressurizes the drawn fuel and discharges thepressurized fuel through the fuel outlet port 52 b.

The fuel filter 53 is located in the pump unit 50. The fuel filter 53surrounds the upper portion and the circumferential periphery of thefuel pump 52. A filter case 55 of the fuel filter 53 includes tubularportions 55 a, 55 b formed of resin. The tubular portions 55 a, 55 bhave a two-layer structure including an inner tubular portion 55 adefining an inner space 55 c in which the fuel pump 52 is located. Thefuel pump 52 is coaxial with the tubular portion 55 a. A filter element56 of the fuel filter 53 is, for example, a honeycomb-like filter sheet.The filter element 56 is accommodated in a space 55 d between the innertubular portion 55 a and an outer tubular portion 55 b. The space 55 ddefined between the tubular portions 55 a, 55 b has a fuel upstream sideand a fuel downstream side on both sides of the filter element 56. Thefuel upstream side and the fuel downstream side respectively communicatewith the fuel outlet port 52 b of the fuel pump 52 and a fuel outlet 59of the fuel filter 53. In the present structure, fuel flows from thefuel outlet port 52 b into the space 55 d, and microscopic foreignmatter contained in the flowing fuel is removed through the filterelement 56. The fuel is, as shown by the dashed dotted line in FIG. 1,discharged to the fueling pipe 11 connected with the fuel outlet 59.

As shown in FIG. 6, the pressure regulator 54 is adjacent to the side ofthe fuel filter 53 in the pump unit 50. Fuel is supplied to the fuelingpipe 11, and the fuel partially flows into the pressure regulator 54connected with the fuel outlet 59 of the fuel filter 53. In the presentstructure, the pressure regulator 54 controls a pressure of the fueldischarged to the fueling pipe 11, which is outside of the fuel tank 2.The pressure regulator 54 generates surplus fuel when regulating thepressure of fuel and discharges the surplus fuel to the jet nozzle 23(FIG. 4) of the jet pump 21 through an exhaust pipe 54 a.

As shown in FIGS. 1, 3, the remaining quantity detector 60 is supportedon the lid member 30 and located outside of the reservoir 20. In thepresent example, the remaining quantity detector 60 is a sender gaugeincluding an arm 62 holding a float 61. The float 61 floats in fuelstored in the fuel tank 2. The remaining quantity detector 60 detects aquantity of fuel remaining in the fuel tank 2 according to the rotationangle of the arm 62.

Configuration

As follows, a configuration of the fuel feed apparatus 1 will bedescribed. As shown in FIGS. 2, 5, the pump unit 50 has a projection 57.The projection 57 is located at a position of the center axis Cp of thepump unit 50. The center axis Cp of the pump unit 50 is offset from thecenter axis Cc of the lid member 30. The center axis Cc of the lidmember 30 coincides with the center axis Cs of the reservoir 20. Theprojection 57 is extended from the filter case 55 and is projectedrelative to the lid member 30. The projection 57 may be accommodated inthe reservoir 20. As shown in FIGS. 1 to 3, 5, a space 58 is formed onthe lid member 30 and under the top plate portion 2 a and the flange 10in the fuel tank 2. The space 58 is substantially in a crescent shapewhen being viewed from the upper side. The space 58 surrounds theperiphery of the projection 57. In the fuel feed apparatus 1, theremaining quantity detector 60 and the support shaft 41 are located inthe remaining space 58. More specifically, the remaining space 58includes two remaining spaces 58 a, 58 b located on both sides of theprojection 57 in the radial direction or the circumferential direction.One remaining space (first remaining space portion) 58 a is located onthe opposite side of the center axis Cp in the offset direction in whichthe center axis Cp is offset. The remaining quantity detector 60 islocated in the remaining space 58 a. The other remaining space (secondremaining space portion) 58 b is located on the side of the center axisCp in the offset direction. The support shaft 41 is located in theremaining space 58 b.

As shown in FIGS. 1, 3, in the present example, the remaining quantitydetector 60 is mounted on a mount portion 35 of the lid member 30 andthereby supported by the lid member 30. The lid member 30 is formed ofresin. The mount portion 35 includes a pair of projected portions 36provided on an upper surface 30 a of the lid member 30. Morespecifically, as shown in FIGS. 5, 7, the projected portions 36 of themount portion 35 are projected from two locations in the upper surface30 a of the lid member 30 toward the exterior of the reservoir 20. Thetwo locations, at which the projected portions 36 are located, arespaced from each other in the circumferential direction Each of theprojected portions 36 and the upper surface 30 a define a slit 37therebetween. The slit 37 extends substantially in parallel with thediameter and extends along the upper surface 30 a of the lid member 30.Referring to FIG. 3, the remaining quantity detector 60 includes a pairof fitting portions 63 each being in a plate shape. Each of the fittingportions 63 is slid into the slit 37 of each of the projected portions36 in the direction shown by the outlined arrow and fitted to the lidmember 30. Thus, the remaining quantity detector 60 is mounted to thelid member 30. In the present example, as shown in FIG. 1, each of theprojected portions 36 has a hooking nail 36 a configured to hook on thecorresponding fitting portion 63 in order to restrict each fittingportion 63 from being detached from the slit 37 of the projected portion36.

In the fuel feed apparatus 1, the remaining space 58 formed around theprojection 57 includes the remaining space 58 a located on the oppositeside of the support shaft 41 across the projection 57. The remainingquantity detector 60 is positioned in the remaining space 58 a. The jetpump 21 is located at a position under the remaining quantity detector60 in the reservoir 20. The fuel tank 2 has a rear portion capable ofsecuring fuel stored irrespective of inclination of the vehicle relativeto the horizontal plane. In the present example, the rear portion of thefuel tank 2 accommodates the jet pump 21 and the remaining quantitydetector 60. The remaining quantity detector 60 and the jet pump 21 arearranged above and below in the vertical direction of the reservoir 20.

In the fuel feed apparatus 1 described above, the lid member 30 isattached to the circumferential periphery 24 a of the opening 24 of thereservoir 20 located in the fuel tank 2 thereby to close the opening 24.In this way, the lid member 30 prohibits spill of fuel from thereservoir 20 even when the vehicle inclines rapidly relative to thehorizontal level. The reservoir 20 accommodates the pump unit 50. It isnoted that the projection (part) 57 of the pump unit 50 is projectedfrom the reservoir 20 through the lid member 30 to the outside of thereservoir 20. Therefore, even when the height of the reservoir 20 is setsmall in the vertical direction, a large inner volume can be secured inthe reservoir 20 as much as possible without causing spill of fuel. Inaddition, the space 58 is formed as a remaining area on the lid member30 around the projection 57 of the pump unit 50, which projects from thereservoir 20. The remaining quantity detector 60 is located in the space58. The present arrangement can secure the inner volume of the reservoir20. With the present configuration, the fuel storage capacity of thereservoir 20 can be increased within the fuel tank 2 having a limitedvolume.

Further, the support shaft 41, which connects the pump unit 50 with theflange 10 mounted on the fuel tank 2, is also located in the remainingspace 58 formed around the projection 57 in the fuel feed apparatus 1.Therefore, the volume of the reservoir 20 with the support shaft 41 canbe secured In the fuel feed apparatus 1, one remaining space 58 a andthe other remaining space 58 b are located across the projection 57 ofthe pump unit 50. The one remaining space 58 a and the other remainingspace 58 b are effectively used for respectively accommodating theremaining quantity detector 60 and the support shaft 41. Therefore, thevolume in the reservoir 20 can be further effectively secured. Inaddition, the support shaft 41 located in the remaining space 58 is anindependent component and may be spaced from other components.Therefore, the support shaft 41 may not interfere with the remainingquantity detector 60 in the remaining space 58 and may not causereduction in volume of the reservoir 20. Consequently, the remainingquantity detector 60 may not extend beyond the remaining space 58 due tothe support shaft 41 interfering with the remaining quantity detector 60extending beyond the remaining space 58 b. Thus, it is not necessary to,for example, dent the lateral side of the reservoir 20 to secure anadditional accommodation space for the remaining quantity detector 60extending beyond the remaining space 58. Thus, the volume of thereservoir 20 can be effectively secured. In the present structure, thefuel storage capacity in the reservoir 20 can be secured as much aspossible.

In addition, the slit 37 for supporting the remaining quantity detector60 on the lid member 30 is formed in the projected portion 36 projectedfrom the reservoir 20 in the fuel feed apparatus 1. Therefore, reductionin volume of the reservoir 20 due to provision of such a holding devicecan be avoided. Therefore, the present structure of the slit 37 can alsocontribute to increase in fuel storage capacity of the reservoir 20.

In addition, the fuel feed apparatus 1 includes the jet pump 21 and theremaining quantity detector 60 located correspondingly in the rearportion of the fuel tank 2. The jet pump 21 and the remaining quantitydetector 60 provided on the reservoir 20 are arranged below and above inthe vertical direction. Therefore, each of the jet pump 21 and theremaining quantity detector 60 can be steadily functionable. Further,the remaining quantity detector 60 located above the jet pump 21 isprovided on the lid member 30, which is mounted on the circumferentialperiphery 24 a defining the opening 24 of the reservoir 20. Therefore,both reduction in interior volume of the reservoir 20 and complicationin shape of the reservoir 20 can be avoided. Therefore, the presentconfiguration can contribute to both increase in fuel storage capacityof the reservoir 20 and enhancement in productivity of the reservoir 20.

Second Embodiment

The second embodiment is a modification of the first embodiment. Asshown in FIGS. 8 to 10, a fuel feed apparatus 1001 according to thesecond embodiment includes an adjustment device 1040. The adjustmentdevice 1040 includes an intermediate member 1042 and a holding portion1046, which have structures different from those of the firstembodiment. The holding portion 1046 supports the support shaft 41.

As shown in FIG. 8, the intermediate member 1042 has a coaxial tubularstructure including an inner tubular portion 1042 a formed of resin. Theinner tubular portion 1042 a is fixed to the support shaft 41 andcoaxial with each other such that the inner tubular portion 1042 a isnot relatively rotatable in the circumferential direction and is notrelatively movable in the axial direction. The intermediate member 1042further includes an outer tubular portion 1042 b. The lid member 30includes an accommodating portion 1032 being in a bottomed tubularshape. The accommodating portion 1032 accommodates the support shaft 41to be in coaxial with each other. The outer tubular portion 1042 b isfitted to the accommodating portion 1032 such that the outer tubularportion 1042 b is not relatively rotatable in the circumferentialdirection and is relatively slidable in the axial direction. The elasticmember 43 is interposed between a bottom portion 1032 a of theaccommodating portion 1032 and the inner tubular portion 1042 a of theintermediate member 1042. Also in the present example, change inrelative position between the integrated components 20, 30, 50, 60 andthe support shaft 41 is allowed in the axial direction, while change inrelative position between the integrated components 20, 30, 50, 60 andthe support shaft 41 is prohibited in the circumferential direction. Inthe present state, the integrated components 20, 30, 50, 60 are pressedonto the bottom portion 2 c of the fuel tank 2.

As shown in FIGS. 8 to 10, the holding portion 1046 being in an annularshape is formed of resin. The support shaft 41 is inserted into theholding portion 1046 to be coaxial with each other. The holding portion1046 includes two fitting pieces 1046 a, 1046 b located at two positionsin the circumferential direction. A fitted portion 1033 includes fittingnails 1033 a, 1033 b provided to the outer circumferential periphery ofthe accommodating portion 1032 of the lid member 30. The fitting pieces1046 a, 1046 b of the holding portion 1046 are respectively fitted tothe fitting nails 1033 a, 1033 b of the fitted portion 1033. In thepresent example, as shown in FIG. 11, each of the fitting pieces 1046 a,1046 b is once elastically deformed outward in the radial direction andis restored inward in the radial direction to be snap-fitted with thecorresponding one of the fitting nails 1033 a, 1033 b. Thereby, theholding portion 1046 is engaged with the lid member 30. In the presentconfiguration, the support shaft 41 is supported by the holding portion1046 fixed to the lid member 30 in the state where movement of thesupport shaft 41 relative to the integrated components 20, 30, 50, 60 isallowed in the axial direction.

Referring to FIGS. 8 to 10, the remaining spaces 58 a, 58 b are formedto interpose the projection 57 therebetween above the lid member 30,which is in a bottomed tubular shape formed of resin. The remainingspaces 58 a, 58 b include the one remaining space 58 a, which is greaterthan the other remaining space 58 b due to the offset of the center axisCp. Both the remaining quantity detector 60 and the support shaft 41 arelocated in the one remaining space 58 a. In the present example, theremaining quantity detector 60 is mounted to a mount portion 1035. Themount portion 1035 is projected from a recessed surface 1030 b, which isdented relative to the upper surface 30 a of the lid member 30.

More specifically, as shown in FIGS. 9, 12, 13, the mount portion 1035being in a plate shape is projected upward substantially in the verticaldirection relative to the recessed surface 1030 b. The mount portion1035 is supported by a lateral side 1030 c of the lid member 30. Thelateral side 1030 c connects the upper surface 30 a with the recessedsurface 1030 b. The mount portion 1035 of the lid member 30 furtherextends upward beyond the upper surface 30 a. Thereby, as shown in FIGS.10, 12, 13, the mount portion 1035 is further supported by multiple ribportions 1034, which is projected upward from the upper surface 30 a. Asshown in FIGS. 9, 12, the mount portion 1035 includes a latch projection1035 c projected from a lateral side 1035 b. The latch projection 1035 cis latched onto a locking hole ((not shown)) of the remaining quantitydetector 60 to support the remaining quantity detector 60.

Further, as shown in FIGS. 9, 10, the mount portion 1035 has a releasewindow 1035 a extending therethrough in the thickness direction. Therelease window 1035 a is a rectangle notch. As shown in FIG. 10, theremaining quantity detector 60 has a bearing portion 1064 being in atubular shape projected toward the mount portion 1035 for rotatablysupporting the support arm 62. The bearing portion 1064 is partiallylocated in the release window 1035 a, thereby being allowed to beextending through the release window 1035 a. In addition, when thesnap-fitting is performed in the way shown in FIG. 11, the fitting piece1046 a, 1046 b of the holding portion 1046 are elastically deformed andexpanded outward. In the present state, the release window 1035 a allowsthe fitting piece 1046 a, which is elastically deformed toward the mountportion 1035, to expand into the mount portion 1035. Thereby, elasticengagement of the holding portion 1046 with the fitted portion 1033 isallowed.

In the fuel feed apparatus 1001 as described above, the one remainingspace 58 a is located on the opposite side of the other remaining space58 b through the projection 57. The one remaining space 58 a is largerthan the other remaining space 58 b and is effectively utilized foraccommodating both the remaining quantity detector 60 and the supportshaft 41. Therefore, the fuel storage capacity of the reservoir 20 canbe increased as much as possible.

Further, the bearing portion 1064 of the remaining quantity detector 60of the fuel feed apparatus 1001 is allowed to extend into the releasewindow 1035 a of the mount portion 1035 of the lid member 30 to whichthe remaining quantity detector 60 is equipped. Therefore, the remainingquantity detector 60 can be easily accommodated within the remainingspace 58 a commonly accommodating the support shaft 41. In addition, therelease window 1035 a of the mount portion 1035 allows elastic fittingof the holding portion 1046 to be engaged with the fitted portion 1033of the lid member 30. Therefore, the holding portion 1046 holding thesupport shaft 41 can be easily mounted to the lid member 30, even in theremaining space 58 a commonly accommodating the remaining quantitydetector 60. As described above, in the present configuration, theremaining quantity detector 60 can be easily accommodated within theremaining space 58 a. Thus, the fuel storage capacity of the reservoir20 can be easily increased. Further, in the present configuration, theholding portion 1046 can be easily mounted to the remaining space 58 a.Therefore, productivity of the fuel feed apparatus 1001 can be enhanced.

In the fuel feed apparatus 1001, inner volume of the reservoir 20 can besecured excluding the portion where the recessed surface 1030 b isformed and dented downward beyond the upper surface 30 a of the lidmember 30. In addition, the large remaining space 58 a is secured on theupper portion of the recessed surface 1030 b. The remaining quantitydetector 60 is mounted to the mount portion 1035, which is projectedupward from the recessed surface 1030 b. Thereby, the remaining quantitydetector 60 is accommodated in the remaining space 58 a common with thesupport shaft 41. Thus, the fuel storage capacity of the reservoir 20can be increased. In addition, the mount portion 1035 having the releasewindow 1035 a is supported by the rib portions 1034, which are projectedupward from the upper surface 30 a of the lid member 30 and therebyreinforced. Therefore, both the easy-accommodation of the remainingquantity detector 60 in the remaining space 58 a and the easy mountingof the holding portion 1046 as described above can be achieved with highrigidity and durability.

Third Embodiment

The third embodiment is a modification of the second embodiment. Asshown in FIGS. 14, 15, a fuel feed apparatus 2001 according to the thirdembodiment includes an adjustment device 2040. The adjustment device2040 includes a second support shaft 2041 formed of metal or resin inaddition to the first support shaft 41 formed of metal. The remainingspaces 58 a, 58 b are located on opposite sides of the projection 57.The second support shaft 2041 is located in the remaining space 58 b onthe opposite side of both the first support shaft 41 and the remainingquantity detector 60. The second support shaft 2041 is coaxiallypress-fitted to the flange 10. The second support shaft 2041 is furtherfitted to the lid member 30 and relatively movable in the axialdirection.

Also in the present fuel feed apparatus 2001, change in relativeposition between the integrated components 20, 30, 50, 60 and the firstsupport shaft 41 is allowed in the axial direction, while change inrelative position between the integrated components 20, 30, 50, 60 andthe first support shaft 41 is prohibited in the circumferentialdirection. In the present state, the integrated components 20, 30, 50,60 are pressed onto the bottom portion 2 c of the fuel tank 2.Therefore, the fuel feed apparatus 2001 is capable of producing the sameoperation effect as that of the second embodiment. In addition, spacereduction effect can be achieved by utilizing the remaining space 58 bother than the remaining space 58 a, in which the first support shaft 41and the remaining quantity detector 60 are located.

Fourth Embodiment

The fourth embodiment is a modification of the second embodiment. Asshown in FIGS. 16, 17, a fuel feed apparatus 3001 of the fourthembodiment includes the lid member 30 formed of resin. The lid member 30includes a mount portion 3035 having a pair of projected portions 3036.Specifically, the projected portions 3036 of the mount portion 3035 areprojected from two locations on the recessed surface 1030 b of the lidmember 30 toward the outside of the reservoir 20. The two locations arespaced from each other in the circumferential direction. Each of theprojected portions 3036 has a cross section in a U-shape or an L-shape.In the present structure, each of the projected portions 3036 defines aslit 3037 while being supported by the lateral side 1030 c of the lidmember 30. The slit 3037 is extended substantially perpendicularly tothe recessed surface 1030 b of the lid member 30. Referring to FIGS. 18,19, the remaining quantity detector 60 includes a pair of fittingportions 3063 each being in a plate shape. Each of the fitting portions3063 is slid into the slit 3037 of each of the projected portions 3036and fitted to the lid member 30. Thus, the remaining quantity detector60 is mounted to the lid member 30. The remaining quantity detector 60of the present example is supported by the lid member 30 in theabove-described way. The mount portion 3035 of the remaining quantitydetector 60 includes projected portions 3036 defining a release window3035 a therebetween. As shown in FIG. 19, the bearing portion 1064extending from the remaining quantity detector 60 is released throughthe release window 3035 a. That is, the bearing portion 1064 is allowedto extend through the release window 3035 a.

As described above, the slit 3037 for supporting the remaining quantitydetector 60 on the lid member 30 is formed in the projected portion 3036projected from the reservoir 20 in the fuel feed apparatus 3001.Therefore, reduction in volume of the reservoir 20 due to provision ofsuch a holding device can be avoided. Therefore, the present structureof the slit 37 can contribute to increase in fuel storage capacity ofthe reservoir 20.

Further, in the fuel feed apparatus 3001, the larger remaining space 58a including the upper space of the recessed surface 1030 b iseffectively utilized for accommodating both the remaining quantitydetector 60 and the support shaft 41. Further, the bearing portion 1064projected from the remaining quantity detector 60 of the fuel feedapparatus 3001 is allowed to extend into the release window 3035 a ofthe mount portion 3035 of the lid member 30 to which the remainingquantity detector 60 is equipped. Therefore, the remaining quantitydetector 60 can be easily accommodated within the remaining space 58 acommonly accommodating the support shaft 41. In this way, reduction involume of the reservoir 20 can be also avoided. Therefore, the presentconfiguration contributes increase in fuel storage capacity of thereservoir 20.

Other Embodiment

As described above, the present invention is not limited to the aboveembodiment, and is capable of being applied to various embodiments andcombinations as long as being undeviating from the gist thereof.

Specifically, the remaining quantity detector 60 is not limited to havethe configuration to detect remaining fuel according to the rotationangle of the arm 62 supporting the float 61, as described above. Theremaining quantity detector 60 may have various configurations fordetecting the remaining fuel, as long as being supported by the lidmember 30. The number of the support shaft 41 is not limited to one. Forexample, similarly to the third embodiment, the flange 10 may beconnected with the integrated components 20, 30, 50, 60 via two or morepillars. In this case, particular one pillar or two or more pillars maybe employed as the support shaft 41 in the above examples. The supportstructure of the remaining quantity detector 60 by the lid member 30 isnot limited to those in the above-described first to fourth embodimentsin which the remaining quantity detector 60 is mounted to the mountportion 35, 1035, 3035. Various kinds of support structures for theremaining quantity detector 60 may be employable. For example, as shownin FIG. 20, the upper surface 30 a of the lid member 30 may have holes38 as mount portions. In this case, the remaining quantity detector 60may have press-fitted portions 39 projected downward and press-fitted tothe hole 38. Thus, the remaining quantity detector 60 may be supportedby the lid member 30 in this way. Alternatively, the mount portion 3035of the fourth embodiment may be provided in place of the mount portion35, 1035 of the first and third embodiments. In this case, the mountportion 3035 may be projected from the upper surface 30 a of the lidmember 30 to support the remaining quantity detector 60 on the lidmember 30.

Summarizing the above-described embodiments, the fuel feed apparatusincludes:

the reservoir being in the bottomed tubular shape and located in thefuel tank;

the lid member located in the fuel tank and mounted to the periphery ofthe opening of the reservoir to close the opening;

the pump unit partially accommodated in the reservoir and located at aposition offset from the center axis of the lid member, the pump unitincluding a projection projected from the lid member to the exterior ofthe reservoir, the pump unit being configured to discharge fuel storedin the reservoir to the exterior of the fuel tank; and

the remaining quantity detector located at the remaining space remainingaround the projection on the lid member in the fuel tank and configuredto detect remaining fuel in the fuel tank.

In the present structure, the lid member located in the fuel tank ismounted to the periphery of the opening of the reservoir to block theopening. Therefore, even when the vehicle inclines rapidly relative tothe horizontal surface, the lid member may avoid leakage of fuel fromthe opening. In addition, the pump unit partially accommodated in thereservoir is projected from the lid member to the outside of thereservoir. Therefore, even when the height of the reservoir is setsmall, the reservoir can secure the inner volume as much as possiblewithout causing spill of fuel. In addition, the pump unit is at leastpartially accommodated in the reservoir and located at the positionoffset from the center axis of the lid member. With the presentstructure, the space in the fuel tank remains on the lid member aroundthe projection of the pump unit projected out of the reservoir.Therefore, the remaining quantity detector can be adequately arranged byeffectively utilizing the remaining space around the projection, withoutdecreasing the volume in the reservoir. With the present configuration,the fuel storage capacity of the reservoir can be increased within thefuel tank having a predetermined limited volume.

The fuel feed apparatus may further include: a pillar located at theremaining space; and a flange mounted to the fuel tank and connectedwith the pump unit via the pillar being independent. In the presentstructure, the pillar, which connects the pump unit with the flangemounted to the fuel tank, is arranged at the remaining space around theprojection. Therefore, reduction in volume of the reservoir due to thearrangement of the pillar can be avoided. In addition, the pillarlocated at the remaining space is an independent component. For example,the pillar is a different component from the remaining quantity detectorand is spaced from the remaining quantity detector. Therefore, reductionin volume of the reservoir due to interference of the pillar with theremaining quantity detector in the remaining space can also be avoided.Therefore, the present structure can contribute to increase in fuelstorage capacity of the reservoir.

The remaining space may include one remaining space (first remainingspace portion) and another remaining space (second remaining spaceportion) located on both sides of the projection. In this case, theremaining quantity detector may be located at the one remaining space,and the pillar may be located at the other remaining space. In thepresent structure, the one remaining space and the other remaining spaceon both sides of the projection can be used effectively for arrangementof the remaining quantity detector and for arrangement of the pillarrespectively. Therefore, the fuel storage capacity of the reservoir canbe increased at a maximum extent.

The remaining space may include one remaining space and anotherremaining space located on both sides of the projection. In this case,both the remaining quantity detector and the pillar may be located atthe one remaining space. In the present structure, for example, the oneremaining space may be larger than the other remaining space across theprojection. In this case, the larger one remaining space can be usedeffectively for arrangement of both the remaining quantity detector andthe support shaft. Therefore, the fuel storage capacity of the reservoircan be increased at a maximum extent.

The remaining quantity detector may include: the float floating in fuelin the fuel tank; the arm holding the float; and the bearing portionsupporting the arm. In this case, the remaining quantity detector may beconfigured to detect a quantity of fuel remaining in the fuel tankaccording to the rotation angle of the arm. In this case, the lid membermay include: the mount portion equipped with the remaining quantitydetector; and the fitted portion to which the holding portion, whichholds the pillar, is elastically engaged. In this case, the mountportion may have the release window configured to: release the bearingportion being projected; and allow the elastic engagement of the holdingportion. In this case, the remaining quantity detector includes thebearing portion being projected for supporting the arm holding thefloat. The bearing portion being projected is released into the releasewindow of the mount portion of the lid member to which the remainingquantity detector is mounted. Therefore, the remaining quantity detectorcan be easily accommodated within the remaining space commonly used forthe support shaft. In addition, the release window of the mount portion,to which the remaining quantity detector is mounted, allows elasticengagement of the holding portion to be engaged with the fitted portionof the lid member. Therefore, the holding portion holding the pillar canbe easily mounted to the lid member, even in the remaining spacecommonly accommodating the remaining quantity detector. As describedabove, in the present configuration, the remaining quantity detector canbe easily accommodated within the remaining space. Thus, the fuelstorage capacity of the reservoir can be easily increased. Further, inthe present configuration, the holding portion can be easily mounted tothe remaining space. Therefore, productivity of the fuel feed apparatuscan be enhanced.

The lid member may include: the mount portion, which is projected upwardfrom the recessed surface being dented downward relative to the uppersurface, and to which the remaining quantity detector is mounted; andthe rib portion projected upward from the upper surface to support themount portion. In the present structure, the inner volume of thereservoir can be secured under the portion of the lid member other thanthe portion of the lid member under which the recessed surface is formedand dented downward from the upper surface. In addition, the largeremaining space can be secured under the portion of the lid member onthe upper side of the recessed surface. In this case, the remainingquantity detector is mounted to the mount portion, which is projectedupward from the recessed surface. Thereby, the detector is accommodatedin the remaining space common with the support shaft. Thus, the fuelstorage capacity of the reservoir can be increased at a maximum extent.In addition, the mount portion having the release window is supported bythe rib portion, which is projected upward from the upper surface of thelid member and thereby reinforced. Therefore, both theeasy-accommodation of the remaining quantity detector in the remainingspace and the easy mounting of the holding portion as described abovecan be achieved together with high rigidity and durability.

The lid member may include the projected portion projected to theoutside of the reservoir to form the slit. In this case, the remainingquantity detector may be fitted to the slit and supported by the lidmember. In the present structure, the lid member has the slit forsupporting the remaining quantity detector formed in the projectedportion projected to the outside of the reservoir. Therefore, reductionin volume of the reservoir due to provision of such a holding device canbe avoided. Therefore, the present structure can contribute to increasein fuel storage capacity of the reservoir.

The fuel feed apparatus may further comprise the jet pump located on thelower side of the remaining quantity detector in the reservoir andconfigured to transport fuel in the fuel tank into the reservoir byinjecting fuel. In the present structure, the jet pump, which transportsfuel in the fuel tank into the reservoir by the fuel injection, and theremaining quantity detector, which detects fuel remaining in the fueltank, may be arranged together at a place where fuel can be secured inthe fuel tank irrespective of inclination of the vehicle relative to thehorizontal plane. In consideration of this, the jet pump and theremaining quantity detector can be aligned in the vertical direction ofthe reservoir in the arrangement where the jet pump is located under theremaining quantity detector in the reservoir. With the presentconfiguration, both the functions of the jet pump and the remainingquantity detector can be steadily produced. Further, the remainingquantity detector located above the jet pump is provided on the lidmember, which is mounted on the circumferential periphery defining theopening of the reservoir. Therefore, both reduction in volume of thereservoir and complication in shape of the reservoir can be avoided.Therefore, the present configuration can contribute to both increase infuel storage capacity of the reservoir and enhancement in productivityof the reservoir.

When only a part of a structure of an element is described in anembodiment, other part of the structure of the element in anotherforegoing embodiment may be applied to the embodiment. The combinationsof the components are not limited to those in the above-describedembodiments. The components in different embodiments may be partially orentirely combined, as long as the components can be properly combined,even if such a combination is not explicitly described.

It should be appreciated that while the processes of the embodiments ofthe present invention have been described herein as including a specificsequence of steps, further alternative embodiments including variousother sequences of these steps and/or additional steps not disclosedherein are intended to be within the steps of the present invention.

Various modifications and alternations may be diversely made to theabove embodiments without departing from the spirit of the presentinvention.

What is claimed is:
 1. A fuel feed apparatus for feeding fuel from afuel tank, the fuel feed apparatus comprising: a reservoir located inthe fuel tank, the reservoir being in a bottomed tubular shape having aperiphery defining an opening; a lid member located in the fuel tank andmounted to the periphery of the reservoir to close the opening; a pumpunit partially accommodated in the reservoir and configured to dischargefuel stored in the reservoir to an exterior of the fuel tank, the pumpunit being located at a position offset from a center axis of the lidmember, the pump unit having a projection projected from the lid memberto an exterior of the reservoir; a remaining quantity detectorconfigured to detect a quantity of fuel in the fuel tank, the remainingquantity detector being located at a remaining space remaining in thefuel tank, the remaining space being located on the lid member andlocated around the projection; a pillar located at the remaining space;and a flange mounted to the fuel tank and connected with the pump unitvia a support shaft, the support shaft being an independent component;wherein the remaining space includes a first remaining space portion anda second remaining space portion located on both sides of theprojection, and both the remaining quantity detector and the supportshaft are located at the first remaining space portion; the remainingquantity detector includes: a float floating in fuel in the fuel tank;an arm holding the float; and a bearing portion supporting the arm, theremaining quantity detector is configured to detect the quantity of fuelin the fuel tank according to a rotation angle of the arm, the lidmember includes: a mount portion to which the remaining quantitydetector is mounted; a holding portion holding the support shaft; and afitted portion to which the holding portion is elastically fitted, andthe mount portion has a release window configured to: release thebearing portion being projected; and allow elastic fitting of theholding portion.
 2. The fuel feed apparatus according to claim 1,wherein the lid member has: an upper surface; and a recessed surfacebeing recessed downward relative to the upper surface, the mount portionis projected upward from the recessed surface to receive the remainingquantity detector, and the lid member includes a rib portion projectedupward from the upper surface to support the mount portion.
 3. The fuelfeed apparatus according to claim 1, further comprising: a jet pumplocated on a lower side of the remaining quantity detector in thereservoir and configured to inject fuel to transport fuel from the fueltank into the reservoir.
 4. The fuel feed apparatus according to claim1, wherein the support shaft is a different component from the remainingquantity detector, and the support shaft is spaced from the remainingquantity detector.
 5. The fuel feed apparatus according to claim 1,wherein the release window is configured to: allow the bearing portionto extend into the release window to release the bearing portion beingprojected; and enable the holding portion to expand through the releasewindow when being elastically deformed to allow the elastic fitting ofthe holding portion.
 6. The fuel feed apparatus according to claim 1,wherein the first remaining space portion is larger than the secondremaining space portion.